Photo frame



FIG. 1 is a perspective view of the photo frame;

FIG. 2 is a front elevational view of the photo frame;

FIG. 3 is a left side elevational view of the photo frame;

FIG. 4 is a right side elevational view of the photo frame;

FIG. 5 is a top plan view of the photo frame;

FIG. 6 is a bottom plan view of the photo frame; and,

FIG. 7 is a back elevational view of the photo frame.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a photo frame, as shown and described. 